Using Shape Tweening

You can use shape tweening when you need to alter the form of any editable shape gradually. Place artwork in a keyframe and then use any of Flash's drawing and editing tools to adjust the contours of a shape on another keyframe. When you apply shape tweening, Flash draws the frames in-between the two keyframes so that the object appears to "morph" between the two states. To provide even more control, you can use shape hints.